McCulloch M16538H ユーザーズマニュアル

Check V-belts for deterioration and wear after 100 hours and 

replace if necessary. The belts are not adjustable. Re place 

belts if they begin to slip from wear.

Keep transaxle free from build-up of dirt and chaff which 

can restrict cooling. 

TO CHANGE ENGINE OIL (See Figs. 14 and 15) 
Determine temperature range expected before oil change.  

All oil must meet API service classification SG-SL.
•  Be sure tractor is on level surface.
•  Oil will drain more freely when warm.
•  Catch oil in a suitable container.
• 

Remove oil fill cap/dipstick.  Be careful not to allow dirt 

to enter the engine when changing oil.

• 

Remove yellow cap from end of drain valve and install 

the drain tube onto the fitting. 

Only use high quality detergent oil rated with API service 

classification SG-SL.  Select the oil’s SAE viscosity grade 

according to your expected operating temperature.

NOTE:  Although multi-viscosity oils (5W30, 10W30 etc.) 

improve starting in cold weather, they will result in increased 

oil consumption when used above 32°F.  Check your engine 

oil level more frequently to avoid possible engine damage 

from running low on oil.
Change the oil after every 50 hours of operation or at least 

once a year if the tractor is not used for 50 hours in one year.
Check the crankcase oil level before starting the engine 

and after each eight (8) hours of operation.  Tighten oil fill 

cap/dipstick securely each time you check the oil level.    

TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

SAE VISCOSITY GRADES

-20 0 30 40 

80 

100 

-30 

-20 0  20 30 

40 

 

F

 

C

32 

-10 

10 

60 

oil_visc_chart1_e

TO CLEAN BATTERY AND TERMINALS
Corrosion and dirt on the battery and terminals can cause 

the battery to “leak” power.
•  Disconnect BLACK battery cable first  then RED  bat-

 tery cable and remove battery from tractor.

•  Rinse the battery with plain water and dry.
• 

Clean terminals and battery cable ends with wire brush 

until bright.

•  Coat terminals with grease or petroleum jelly.
• 

Reinstall battery (See “REPLACING BATTERY” in the 

Service and Adjustment sec tion of this manual).

•  Unlock drain valve by pushing inward and turning 

coun ter clock wise. 

•  To open, pull out on the drain valve. 
•  After oil has drained completely, close and lock the 

drain valve by pushing inward and turning clockwise 

until the pin is in the locked position as shown. 

• 

Remove the drain tube and replace the cap onto to the 

bottom fitting of the drain valve. 

•  Refill engine with oil through oil fill dipstick tube.  Pour 

slowly.  Do not overfill.  For approximate capacity see 

“PRODUCT SPECIFICATIONS” section of this man u al.

•  Use gauge on oil fill cap/dipstick for checking level.  

Be sure dipstick cap is tightened securely for accurate 

reading.  Keep oil at “FULL” line on dipstick. Tighten 

cap onto the tube securely when finished.

Your engine will not run properly using a dirty air filter. 

Service air cleaner more often under dusty conditions. See 

Engine Manual.

Replace the engine oil filter every season or every other 

oil change if the tractor is used more than 100 hours in 

one year.

Air screen must be kept free of dirt and chaff to prevent 

engine dam age from overheating.  Clean with a wire brush 

or com pressed air to re move dirt and stubborn dried gum 

fibers.

Inspect and replace corroded muffler and spark arrester 

(if equipped) as it could create a fire hazard and/or dam-

age.

Replace spark plugs at the beginning of each mowing sea-

son or after every 100 hours of use, whichever comes first.  

Spark plug type and gap setting is shown in "PROD UCT 

SPECIFICATIONS" section of this manual.